D113

Product Overview

Macroporous acrylic acid-based carboxylic acid (-COOH) weak acid cation exchange resin is specifically designed for lithium extraction from salt lakes, brine, and battery waste liquids. It is characterized by selective adsorption of Li⁺ at high magnesium-to-lithium ratios , separating impurities such as magnesium and calcium. It is a mainstream type for lithium resource enrichment and high-purity preparation. The carboxylic acid group exhibits a significantly higher affinity for Li⁺ than Mg²⁺ , Ca²⁺ , Na⁺ , and K⁺ . At a magnesium-to-lithium ratio of 20–50:1, the Li⁺ adsorption capacity is ≥15–20 g/L, and the magnesium rejection rate is ≥90%. It is suitable for high magnesium-to-lithium ratio systems such as salt lake brines, underground brines, and battery leachates.

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Typical lithium extraction applications include

Lithium extraction from salt lake brine: high magnesium-to-lithium ratio (10–50:1) enrichment of Li⁺ in brine , with a lithium recovery rate ≥95%;

Lithium extraction from underground brine/oilfield water: deep enrichment of low-concentration lithium (50–500 mg/L);

Lithium extraction from lithium battery waste leachate: separation of Li⁺ from Ni/Co/Mn/Fe/Al to prepare high-purity lithium salts(lithium carbonate/lithium hydroxide);

Purification: removal of calcium and magnesium impurities, increasing product purity to 99.9%+;

Acidic lithium-containing wastewater from mines: lithium resource recovery and wastewater discharge meeting standards.

Product Parameters

Framework structure	macroporous acrylic acid copolymer crosslinked (PAA-DVB)
Functional group	carboxylic acid group (-COOH), weakly acidic
Water content	45–52% (H⁺ type)
Particle size range	0.315–1.25 mm (≥95%); ＜0.315 mm ≤1%
Effective particle size	0.40–0.70 mm
Uniformity coefficient	≤1.6
Wet true density	1.14–1.20 g/mL
Wet apparent density	0.72–0.80 g/mL
Mass total exchange capacity	≥10.8 mmol/g (dry)
Volume total exchange capacity	≥4.4 mmol/mL
Sphericity after milling	≥95% (high mechanical strength)